All mail sent to the Tax Division office in Juneau through the U.S. Postal Service must be addressed to P.O. Box 110420, Juneau, AK 99811. Beginning Oct. 1, the Post Office will not deliver mail to the division’s Willoughby Avenue address, and the mail will be returned to the sender. In those cases, tax returns and payments may miss their filing deadline. This change does not affect the Anchorage Tax Division office.